/Engine/Plugins/Experimental/RenderGrid/Source/RenderGrid/Public/RenderGrid/RenderGrid.h
In here, you could for example change elements in the world according to what job this is.
[UFUNCTION](Programming/UnrealArchitecture/Reference/Functions)(BlueprintImplementableEvent, Meta=(DisplayName="BeginJobRender")) void ReceiveBeginJobRender ( [URenderGridQueue](API\Plugins\RenderGrid\RenderGrid\URenderGridQueue) * Queue, [URenderGridJob](API\Plugins\RenderGrid\RenderGrid\URenderGridJob) * Job )